I appreciate what you're doing Chris, I want 40k night at Abington to be successful as well. The problem with simply asking what night works for everyone is that no night works for everyone. I've talked a lot with Chase, Sam, and Ben (Boulanger) about how Thursday night 40k got off the ground. Basically, to get people to show up to a 40k night, you have to have people at the 40k night. Thursday night wasn't picked because it was an especially convenient day for everyone, but now that it's so successful, it's something that's worth prioritizing over other things for that community.
As silly as it sounds, if you build it (in the sense of getting multiple players to routinely show up for MONTHS on end, at a defined time and place) they will come. Honestly, I'm not the right person to get this off the ground. I don't know a ton of people very well at Abington. If you do, email a bunch of people, and say "HEY! COME TO ABINGTON ON NIGHT XYZ!". Then, put up a forum post saying HOLY CRAP 10 PEOPLE ARE COMING! YOU COME TOO! HAVE FUNTIMES WITH PLASTIC DUDESMANS!